<template>
  <el-container class="home-conainer">
    <!-- 头部区域-->
    <el-header>
      <div class="logo">
        <img src="../assets/heima.png" alt="logo">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体区域-->
    <el-container>
      <!-- 侧边栏-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-btn" @click="toggleCollapse">|||</div>
        <!-- 菜单区域-->
        <el-menu
              background-color="#333744"
              text-color="#fff"
              active-text-color="#409eff"
              :unique-opened="true"
              :collapse="isCollapse"
              :collapse-transition="false"
              :router="true"
              :default-active="activePath">
              <!-- 一级菜单-->
              <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                <!-- 一级菜单模板区-->
                <template slot="title">
                  <!-- 图标-->
                  <i :class="iconsObj[item.id]"></i>
                  <!-- 文本-->
                  <span>{{ item.authName }}</span>
                </template>
                <!-- 二级菜单-->
                <el-menu-item :index="'/' + subItem.path"
                      v-for="subItem in item.children"
                      :key="subItem.id"
                      @click="saveNavState('/' + subItem.path)">
                  <template slot="title">
                    <!-- 图标-->
                    <i class="el-icon-menu"></i>
                    <!-- 文本-->
                    <span>{{ subItem.authName }}</span>
                  </template>
                </el-menu-item>
              </el-submenu>
            </el-menu>
      </el-aside>
      <!-- 右侧内容主体-->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('active')
  },
  data: function () {
    return {
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('active', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-conainer {
    height: 100%;
  }
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    color: #fff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
    }
    span {
      margin-left: 15px;
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }

  .iconfont {
    margin-right: 10px;
  }
  .toggle-btn {
    background-color: #4a5064;
    font-size: 12px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
